18. Crosstalk occurs when the signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.

Answer: True

Difficulty: Moderate

Reference: Sources of Errors

19. Attenuation refers to the loss of signal strength.

Answer: True

Difficulty: Easy

Reference: Sources of Errors

20. When the signals from two circuits combine to form a new signal that falls into a frequency band reserved for another signal, this is called, intermodulation noise.

Answer: True

Difficulty: Moderate

Reference: Sources of Errors

21. Eliminating jitter to generate a pure carrier signal in an analog circuit is impossible.

Answer: True

Difficulty: Easy

Reference: Sources of Errors

22. The distance between repeaters or amplifiers on a telephone circuit is determined by the amount of power gained per unit length of the transmission.

Answer: False

Difficulty: Moderate

Reference: Error Prevention

23. When we amplify the signal on an analog circuit, we also amplify any noise that is present on the circuit.

Answer: True

Difficulty: Easy

Reference: Error Prevention

24. For effective error detection and correction, extra error detection “data” must be included with each message

Answer: True

Difficulty: Moderate

Reference: Error Detection

25. In an odd parity-checking scheme, the parity bit is set to make the total number of ones in the byte (including the parity bit) an even number.

26. Parity checking can only detect an error when an even number of bits are switched.

Answer: False

Difficulty: Moderate

Reference: Parity Checking

27. Cyclical redundancy check is one of the most popular polynomial error-checking schemes.

Answer: True

Difficulty: Easy

Reference: Cyclical Redundancy Check

28. The simplest method for error correction is retransmission.

Answer: True

Difficulty: Easy

Reference: Error Correction via Retransmission

29. Another term for stop-and-wait ARQ is sliding window.

Answer: False

Difficulty: Easy

Reference: Continuous ARQ

30. One type of forward error correction is the Hamming code.

Difficulty: Moderate

Reference: How Forward Error Correction Works

31. Forward error correction is commonly used in satellite transmission.

Answer: True

Difficulty: Easy

Reference: Forward Error Correction

32. HDLC is very similar to the SDLC synchronous data link protocol.

Answer: True

Difficulty: Moderate

Reference: High-Level Data Link Control

33. Point-to-point Protocol is a byte-count-oriented protocol.

Answer: True

Difficulty: Easy

Reference: Point-to-Point Protocol

34. Overhead bits are used for error checking and marking the start and end of characters and packets.

Answer: True

Difficulty: Easy

Reference: Transmission Efficiency

35. Transmission efficiency refers to the percentage of bits transmitted without errors.

Answer: False

Difficulty: Moderate

Reference: Transmission Efficiency

Chapter 5

1. Several different protocols exist that specify how network and/or transport layer packets are organized.

Answer: True

Difficulty: Easy

Reference: Transport and Network Layer Protocols

2. TCP/IP is a data link protocol that is used on the Internet.

Answer: False

Difficulty: Moderate

Reference: Transport and Network Layer Protocols

3. The network layer sits directly between the application layer and the data link layer in the Internet five-layer network model.

Answer: False

Difficulty: Easy

Reference: Introduction

4. The network layer is responsible for end-to-end delivery of the message.

Answer: False

Difficulty: Easy

Reference: Introduction

5. The transport layer routes messages thought the network selecting the best path from the source to the destination station.

Answer: False

Difficulty: Easy

Reference: Introduction

6. The transport layer process running on the destination computer, reassembles the fragmented application message before passing it up to the application layer

Answer: True

Difficulty: Moderate

Reference: Introduction

7. Software with multiprotocol stacks refers to the fact that the software supports several different transport/network protocols.

Answer: True

Difficulty: Easy

Reference: Transport and Network Layer Protocols

8. TCP is the network layer protocol used on the Internet today.

Answer: False

Difficulty: Easy

Reference: Transmission Control Protocol

9. IP is responsible for error-free delivery of packets on a TCP/IP network.

Answer: False

Difficulty: Easy

Reference: Internet Protocol

10. The TCP portion of TCP/IP performs linking to the application layer.

Answer: True

Difficulty: Easy

Reference: Transmission Control Protocol

11. The source port identifier in the TCP header tells the TCP software on the destination computer, which application on the destination it should pass the packet to.

Answer: False

Difficulty: Easy

Reference: Linking to the Application Layer

12. TCP includes a sequence number so that the packets can be reassembled at the destination in the correct order.

Answer: True

Difficulty: Moderate

Reference: Transmission Control Protocol

13. The latest version of IP is IPv7, which increases the address space from 128 bits to 256 bits.

Answer: False

Difficulty: Easy

Reference: Internet Protocol

14. To help determine to which application a transmission should be delivered on a particular computer, TCP uses the application layer port addresses to distinguish among many open applications on a computer

Answer: True

Difficulty: Moderate

Reference: Linking to the Application Layer

15. Source port address is the logical address generated by the application layer on the source computer to identify the application, which is sending the data.

Answer: True

Difficulty: Easy

Reference: Linking to the Application Layer

16. The standard port number for Telnet is 53.

Answer: False

Difficulty: Easy

Reference: Linking to the Application Layer

17. Because there is a limit on the length of a frame that the data link layer can transmit from node to node, the transport layer breaks up the message from the application layer into several smaller packets.

Answer: True

Difficulty: Moderate

Reference: Segmenting

18. Connectionless routing sets up a TCP connection, or virtual circuit between a sender and receiver.

Answer: False

Difficulty: Moderate

Reference: Connectionless Messaging

19. TCP/IP operates only as connection-oriented.

Answer: False

Difficulty: Moderate

Reference: Connectionless Messaging

20. Quality of Service routing is a special type of connection-oriented routing in which different connections are assigned different priorities.

Answer: True

Difficulty: Easy

Reference: Quality of Service

21. An example of an application layer address is www.indiana.edu

Answer: True

Difficulty: Easy

Reference: Addressing

22. The network layer address for IP is ten bytes long when using IPv4.

Answer: False

Difficulty: Easy

Reference: Addressing

23. The data link layer address is generally encoded in a network card by the card’s manufacturer.

Answer: True

Difficulty: Easy

Reference: Assigning Addresses

24. IPv4 addresses offer unlimited opportunity for expansion and growth on the Internet.

Answer: False

Difficulty: Easy

Reference: Assigning Addresses

25. Subnet masks tell computers what part of an IP address is to be used to determine whether a destination is in the same subnet or in a different subnet.

Answer: True

Difficulty: Moderate

Reference: Subnets

26. The most common standard for dynamic addressing for TCP/IP networks is Dynamic Host Control Protocol.

Answer: True

Difficulty: Easy

Reference: Dynamic Addressing

27. Translating an application layer address to a network layer address and finally to a data link layer address is called address resolution.

Answer: True

Difficulty: Easy

Reference: Address Resolution

28. Part of the function of address resolution is translating the application layer address of the destination into a network layer address.